<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
	<!DOCTYPE html>
	<html>
		<head>
			<meta charset="utf-8">
			<title>网页标题</title>
		</head>
		<body>
			
			<script>
				
				
				window.onload = function()
				{
					setInterval(function()
					{
						var r = Math.floor(Math.random()*256);
						var g = Math.floor(Math.random()*256);
						var b = Math.floor(Math.random()*256);
						// rgb(255,0,0)
						document.body.style.backgroundColor =  "rgb("+r+","+g+","+b+")"
					},1000)
				}
				
				
			</script>
		</body>
	</html>